The idea is this: polyunsaturated fats (PUFAs) are bad, real bad. You want to minimize them in your body. But how? By eating highly saturated fat foods...especially coconut oil.
So you take a couple tablespoons of coconut oil for a week and gain 2 lbs. You proclaim "This is B.S.!" You throw your coconut oil in the trash and go on a water fast. Congratulations, you have no idea what you are doing.
There is plenty of information on the internet about how bad PUFAs are. It is a national disaster of epic proportions. The obesity epidemic is only the tip of the iceberg. We may never know the extent of the mess created by making PUFAs ubiquitous in the diet. But we do know that it is possible to reduce the PUFA concentrations in our body tissues.
THE GOOD NEWS!
It is easy to reduce the PUFA in your body. Avoid all of the high PUFA oils. Read those ingredient labels. Start consuming coconut oil on a daily basis. Cut up some corn tortillas and brush them with coconut oil and bake them to make your own snack chips. Throw out the margarine and vegetable oils in your pantry. READ THOSE INGREDIENT LABELS.
Drink milk if you want to. Eat cheese if you want to. Eat chocolate if you want to. Substitute coconut oil for margarine in recipes. Don't worry about "extra virgin" type coconut oils. The cheaper refined coconut oils may be even better because they have a longer shelf life and less materials in them that can speed up rancidity.
DO NOT COUNT CALORIES OR CARBOHYDRATES OR FATS IF YOU ARE OBESE!
There are a few foods you will want to avoid. Avoid products with any vegetable oils in the ingredients (except the tropical oils). Minimize nuts, peanuts, seeds and cashews. Minimize poultry, eggs, fish and pork because they can be high in PUFA. Less is best but none may be no fun.
If you are going to consume fats you want them to be mostly saturated like coconut oil. But the best part of coconut oil is that it is low in PUFA. Macadamia nut oil is another good oil that is fairly low in PUFA but it is high in monounsaturated fat (MUFA). Macadamia nut oil is also very expensive. Olive oil and lard are okay if used sparingly. But because of their PUFA content it might be better to use a lower PUFA alternative.
THE BAD NEWS!
It takes a long time to change your tissue PUFA concentrations. For an obese person it takes about 2-3 years of eating a diet low in PUFA before you get to see the results. It takes about 4 years to completely transform your tissue lipid concentrations to match your dietary lipid concentrations. Every meal you eat is an investment in your future body.
If you can imagine eating normal foods and carefully avoiding foods high in PUFA for an entire year and not seeing any result, it could be understandably frustrating and seem like it will never work. It takes patience and commitment to get results. But in the end the effect is astonishing! Look up the results of Jon Gabriel. He went from over 400 lbs. to 183 lbs. and in the last few weeks the weight just flew off him. Usually on a diet the last few pounds are the hardest to lose.
Here is a podcast interview with Dr. Ray Peat to check out.